Grain growth discontinuous

During discontinuous grain growth, the grain boundaiy can move as is shown in Figure 16.14 [37]. Here we see that the grain boundary velocity is perpendicular to the grain boundary and in the direction... 

Carpay EMA (1977) Discontinuous grain-growth and pore drag. J Am Ceram Soc 60 82-83... 

Schreiner, M., Schmitt, Th., Lassner, E. and Lux, B., On the origins of discontinuous grain growth during liquid phase sintering of WC-Co cemented carbides, Powder MetalL Inter., 16, 180-83, 1984. 

At low concentrations of the liquid phase, the elimination of isolated pores is continued at a reduced rate, due to the solution precipitation and grain-shape accommodation. If the volume fraction of the liquid is sufficiently high, the filling of the isolated pores could be discontinuous [95, 100]. In this case, grain growth, rather than grain-shape accommodation, is responsible for the filling of the pores. 

P, E. D. Morgan Franklin Institute) In effect you say that redistribution of the solid via solution-precipitation allows the movement of boundaries. I wonder if the situation is not reversed, i.e., that the moving boundaries are dragging the liquid with them. It is known that boundaries can drag pores and solid particles with them, so why not liquid phases This is easy to visualize when the liquid is the discontinuous phase and in effect fills the pores. Grain growth is then controlled by the movement of the liquid-filled pores, redistri-... 

---